Rakefile in pngcheck-0.1.0 vs Rakefile in pngcheck-0.2.0

@@ -1,17 +1,58 @@
 # frozen_string_literal: true
 
 require "bundler/gem_tasks"
 require "rspec/core/rake_task"
+require "rubocop/rake_task"
 
 RSpec::Core::RakeTask.new(:spec)
-
-require "rubocop/rake_task"
 RuboCop::RakeTask.new
 
 task default: %i[spec rubocop]
 
 task :compile do
   require_relative "ext/extconf"
 end
 
 task spec: :compile
+
+desc "Build install-compilation gem"
+task "gem:native:any" do
+  sh "rake platform:any gem"
+end
+
+require "rubygems/package_task"
+
+desc "Define the gem task to build on any platform (compile on install)"
+task "platform:any" do
+  spec = Gem::Specification::load("pngcheck.gemspec").dup
+  task = Gem::PackageTask.new(spec)
+  task.define
+end
+
+File.readlines(".cross_rubies", chomp: true).each do |platform|
+  desc "Build pre-compiled gem for the #{platform} platform"
+  task "gem:native:#{platform}" do
+    sh "rake compile platform:#{platform} gem target_platform=#{platform}"
+  end
+
+  desc "Define the gem task to build on the #{platform} platform (binary gem)"
+  task "platform:#{platform}" do
+    spec = Gem::Specification::load("pngcheck.gemspec").dup
+    spec.platform = Gem::Platform.new(platform)
+    spec.files += Dir.glob("lib/pngcheck/*.{dll,so,dylib}")
+    spec.extensions = []
+    spec.dependencies.reject! { |d| d.name == "mini_portile2" }
+
+    task = Gem::PackageTask.new(spec)
+    task.define
+  end
+end
+
+require "rake/clean"
+
+CLOBBER.include("pkg")
+CLEAN.include("ports",
+              "tmp",
+              "lib/pngcheck/*.dll",
+              "lib/pngcheck/*.dylib",
+              "lib/pngcheck/*.so")